Biology Questions

6 Does the size of a frog embryo change as cleavage progresses

9 Explain why cleavage is restricted to the blastodisc in the chick embryo

7 What is the fate of the blastopore in the frog embryo Explain

Draw the skeletal line structure of 3 5 diethyl 1 propylcyclohexanol

Draw the simplest curved arrow mechanism possible for the reaction shown below You may need to re draw structures to show bond lines or lone pairs t

Draw the condensed structure of 1 2 propanediol CU CH OH CH OH

Draw the condensed structure of 1 5 pentanediol CH OH CH CH CH CH OH

Aseptic Technique Introduction Aseptic technique is essential in all microbiological laboratory procedures to ensure that none of the media or cultures is contaminated with unwanted microorganisms It is extremely important to master this technique to have meaningful results in your exercises and for your independent projects Procedure Inoculate a phenol red broth with Escherichia coli E coli using an inoculating loop as demonstrated by the instructor Make sure to use the tube labeled Eco Flame the loop and mock inoculate a second phenol red broth Put your labeled tubes in the rack up front They will be incubated at 37 C for 2 days at which point your instructor will move the cultures to the fridge until the next lab period

The molecule shown below is and may play a role in O cardiolipin starvation response O phosphatidylethanolamine heat response O phosphatidylglycerol heat response O phosphatidylglycerol starvation response

Which structure acts as both a barrier and a facilitator for the uptake of nutrients and other substances in the environment Select one O Cell membrane O Cell wall O Siderophores O Periplasmic space

Unlike Bacteria Archaea have maintain membrane stability Select one O terpenoid O hopanoid O cardiolipin lipoprotein chains in their membrane which help with

The lipopolysaccharide of the outer membrane is of medical importance because it acts as a n Select one O endotoxin O endospore O toxoid antibiotic

The structure shown below is found in the molecules are connected by the Select one O cell wall peptide O cell wall sugar O cell membrane peptide O cell membrane sugar of some bacteria and the larger cross link shown at the arrow M M

Which would be an example of a valid exception to the Full Faith and Credit Clause A State may not enforce the criminal laws of another state A State may invalidate a birth certificate from another state A State may not recognize a Olegal marriage performed in another state A State may provide asylum for the subject of a lawsuit filed in another state

Federalism divides the power of government based on Duties Judicial Executive and Legislative powers Territory A national and regional governments Voting results How elections of officials are carried out Tradition Based on how O power has been divided before a

1 What continents were left untouched by European explorers 2 Which country was most interested in exploring around the southern tip of Africa Portuguese 3 Identify two English explorers 4 In which direction did Columbus travel West

1 Most of Egypt has what kind of land Desert 2 Which country is mostly grassland Kenya or Gabon 3 Are there more forests in the northern or central part of Africa Central part of Africa 4 In this African country three fourths of the people farm Is that country Senegal or Gabon

What factor seems to mitigate the power of the government to oversee campaign financing O Lack of public awareness O Lack of public will to change it Politicians who raise and spend the money make the laws O The Internet

Why are elections so critical to the democratic process Elections give the power to the people Elections force political parties to spend large amounts of money Elections always produce the best choice for the times Elections can be easily manipulated

The 2000 presidential election prompted wide scale changes in a 2002 election law that re introduced poll taxes instituted federal control of the Florida presidential elections centralized and computerized voter registration systems required replacement of lever operated and punch card voting O devices by 2006 and centralized and computerized voter registration systems

Which of these is NOT one of the criticisms of the primary method of nomination Resentment over having to declare a party affiliation A lack of suitable choices for an office O They are expensive Process may lead to airing of the party s dirty laundry and hurt a candidate s chances in the general election

J DOO DOO DOO In terms of modern elections soft money refers to what Money given for party building activities but are shifted to presidential and congressional campaigns Money given to Political Action Committees but are shifted to presidential and congressional campaigns Money given by individuals to candidates who lost in a primary and divert the funds to the party nominee Money given to elect state candidates but end up in the

Why were nominating methods such as the caucus and conventions reformed into a system that mostly used direct primaries Caucuses and conventions were too expensive Caucuses and conventions O were hard to conduct in a less mobile society Party bosses and political O machines could hijack the caucuses and conventions The best candidates could not O always get the convention floor

From the options below which one is a private legal source of money for elections O Federal and state treasury Small contributors and wealthy individuals O National banks O Corporations

What is the nominating process It is the process of candidate representation It is the process of candidate selection The process of party selection It is the process of candidate evaluation

What atom forms the backbone of almost all biological molecules O Carbon Sulfur Hydrogen Nitrogen

Which of the following statements about the polymerization of macromolecules is false Often the energy needed for polymerization is supplied by ATP Water is added to join the monomers of the macromolecules A monomer is usually activated by the coupling of the monomer to a carrier The polymer chain usually has two different ends

Which of the following types of light microscopy improves the resolution of thick specimens by illuminating one plane of the specimen at a time Brightfield microscopy Fluorescence microscopy Confocal microscopy Phase contrast microscopy

While fishing you make the following observations a Water spiders appear to be able walk on the surface of the water b Flat rocks may be made to skip across the water Which of the following properties of water can explain these observations A and B Water is an excellent solvent Water molecules are heavy Water molecules are cohesive

You are working on a project that involves the direct observation of DNA molecules The microscope that would give you the best information at this time would be the phase contrast microscope transmission electron microscope light microscope fluorescent microscope

The cell membrane can be described most accurately as permeable to all small molecules and ions impermeable to larger molecules independent of their chemical characteristics permeable to all molecules except water permeable to some molecules and impermeable to others

Listen Which of the following molecules is most likely to cross the cell membrane directly by passive diffusion A steroid hormone a hydrocarbon Insulin a polypeptide Fructose a sugar Na

The limit of resolution can best be defined as the solvent that must be available to remix a solution the distance that two objects must be apart to be distinguished as separate objects the distance that an object must be moved to be distinguished from its background the inverse of the wavelength of light it is greatest for black light

Which of the following is closest to a micrometer in size The width of a strand of DNA The length of a plant cell The length of a chicken egg A typical prokaryotic cell

Listen Which of the following statements is false All cells have a membrane bound nucleus All organisms consist of one or more cells The cell is the basic unit of structure for all organisms All cells arise from preexisting cells

Match the description to the appropriate taxon D Phylum Cnidaria Class Scyphozoa Phylum Cnidaria Class Anthozoa Phylum Cnidaria Class Hydrozoa Phylum Ctenophora 1 2 3 4 Polyp is the predominant form in the life cycle but the medusa can also be present Examples include Hydra and Obelia Medusa is the predominant form in the life cycle but the polyp stage can also be present Examples include jellyfish like Aurelia Polyps are the only body form found in the life cycle no medusa stage is present Examples include sea anemones and corals Transparent bodies with comblike bands of cilia with or without tentacles Examples include sea walnuts

Which of the following statements about Cnidarians and Ctenophores are accurate Select all that apply Ctenophores are filter feeders whereas cnidarians are carnivores Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions Both cnidarians and ctenophores produce and utilize cnidocytes for prey capture Cnidarians have an incomplete digestive system whereas ctenophores have a complete digestive system

A hydra or sea anemone displays the body form whereas a jellyfish displays the body form polyp polyp medusa medusa Opolyp medusa

The body plan of a cnidarian is best described as An outer cellular gastrodermis and an inner cellular epidermis separated by a gelatinous mesoglea An outer gelatinous mesoglea underlain by a cellular epidermis and gastrodermis An outer cellular gastrodermis a middle layer of cellular endodermis and an inner layer of gelatinous mesoglea O An outer cellular epidermis and an inner cellular gastrodermis separated by a gelatinous mesoglea An outer cellular epidermis a middle layer of cellular gastrodermis and an inner layer of gelatinous mesoglea

What are the cnidocytes Ospecialized excretory cells for waste removal specialized adhesive cells used in feeding specialized flagellated cells for water movement through the cnidarian body specialized ciliated cells that help the animal swim specialized cells with threadlike filaments that function in prey capture and defense

Which of these is the best summary of the paragraph Maya Angelou has been called America s most visible black female autobiographer by scholar Joanne M Braxton She has written her autobiography and poetry Maya Angelou is a well known African American writer She has written six volumes of autobiography which brought her international recognition She was nominated for a National Book Award and a Pulitzer Prize She has been awarded more than 30 honorary degrees

What is the first step in the process of writing a summary O Read and understand the text O Identify the author s purpose Change the words and structure of the sentences Choose the most important information

Which of these is the best summary of the paragraph about pyramids The Great Pyramid of Khufu at Egypt is the tallest pyramid in the world It is the only one of the Seven Wonders of the Ancient World that remains It is built entirely of limestone on a square base with sides measuring about 230 m covering 13 acres Its four sides face the four cardinal points at an angle of 52 degrees Of the original height of 146 5 m only 137 m is left at present due to the theft of the fine quality limestone to build houses and a mosque in Cairo Pyramids are the largest Fru IKO 0 th The fallort

What can be left out while writing a summary Secondary ideas O Secondary details Secondary anecdotes examples O All of the choices or

When assigned to summarize a passage what should be paid attention to while reading the passage Pay attention to the purpose of the author Pay attention to your purpose to summarize Pay attention to the most O important information in the text

ummarizes the passage All measurements are inexact Oand it can be eliminated by careful laboratory practices It is impossible to measure the exact value of any quantity The magnitude of error is due Oto precision proper calibration and competent application Measuremont orror is different

Which sentence best describes the closed primary The closed primary prevents one party from raiding the other s primary by nominating weaker candidates The closed primary does not O force voters to reveal their party preference public The closed primary does not O exclude independent voters from the process The closed primary undercuts O the concepts of party loyalty and

Of the five methods of nomination which one s were susceptible to hijacking by party bosses O Direct primaries O Caucuses O Conventions

Most states have adopted an Australian ballot which has all but which of these features O It is printed at public expense OIt is marked in secret It is given out only at the polls one to each qualified voter It lists the names of candidates only from the two major parties

Why does the government try to regulate the use of money in political campaigns Regulations exist to sway the O election to the advantage of one political party People worry that candidates O could buy their way into public office Groups or individuals could use money donations to exert undue influence on possible future officeholders Both people worry that candidates could buy their way into public office and groups or